Improvement in hoisting apparatus



f SISheets--Shet WILLIAM. WILLIAMSON.

lmprovment'in Hosting Apparatus. No.127,726. Parentedmnmman.

's sheetS--sheetz WILLIAM. C. WILLIAMSON. Improvement in Hoistin .PICS

UNITED STATES PATENT CEEICE.

IMPROVEMENT IN HOISTING APPARATUS.

Specification forming part of Letters Patent No. 127,726, dated June 11,1872.

Specification describing an Improved Hoisting-Engine, invented byWILLIAM C. WIL- LIAMsON, of the cityand county of Philadelphia and Stateof Pennsylvania.

This invention relates to a hoisting-engine, in which the closing of theregulating-valve, the throwing out of contact of the groovedfriction-wheels, and the brakage of the drum, are accomplishedsimultaneously by the operation of a single hand-lever, which alsooperates to slow down the engine immediately when the brake is put on.

Figure l is an isometrical perspective. Fig. 2 is a side elevation. Fig.3 is anend elevation. Fig. 4 is a plan view.

A is the bed-plate of the engine. B B are frames or housings on and atopposite Vsides of the same. (.l is a steam-cylinder bolted to the outerside of the housings B; its steamchest D is on the inner side. E is atransverse shaft at the front end of the machine. It turns in suitablejournal-boxes on the housings. At one end, within the bed-plate, it hasthe pinion grooved wheel F, while at the other it has the balancecrank-wheel G, which, by means of the rod H, connects with thecross-head I working in the guides J of the engine. K is a transverseshaft which turns in the eccentric crank journal-boxes L in bearings ofthe housings. It is situated above and between the steam-cylinder C andthe shaft E; it carries the drum M and the spurgrooved Wheel N whichmeshes into the pinion F. O is a rock-shaft placed transversely of themachine. Below and between the steamcylinder C and the shaft K it turnsin suitable boxes, and is operated by means of the lever P. Q is abrake-strap which takes over a flange of the spur-grooved wheel N; oneend of it is attached to the crank B of the shaft O; the other end isattached to the lug a of the housing B. S is a regulating-valveconnecting with the steam-chest D; its valvestem b connects eitherdirectly with the pin of the crank T on the rock-shaft O, or through theintervention of a connecting-rod. U is a steam-pipe from the boiler tothe regulatingvalve S. Vis a pipe leading from the pipe U to thesteam-chest D. The ilow of steam to the regulating-valve S is controlledby the stop-valve c, and the iiow of steam to the steam-chest, by thevalve d. The rope W of the drum leads to the hold of a ship or otherplace from which anything is to be raised.

Before commencing to lift, the lever P is turned toward thesteam-cylinder, which movement turns the rock-shaftO and thereby causesthe rods e e, connecting with the cranks fon both ends of the shaft andthe crank-eccentrics L, to turn the said eccentrics in their bearings,which parts th'e shaft K from the shaft E, and thus breaks the contactof the grooved wheels F N. The valve c is shut down, (or not, accordingto the disposition of the engineer-it can be used open, and alsodifferently located-) thereby cutting off the steam from theregulating-valve S. The valve d is opened to admit sufficient steam tothe steam-chest D to slowly run the unloaded engine. On the lever Pbeing thrown forward the grooved wheels mesh, the regulatin g-valve Sopens simultaneously, (when the valve c is closed it must be openedbefore the valve S can admit steam to the cylinder,) and the drum windsor takes up its rope. When the load is raised to the required height thelever P is thrown back, which disconnects the grooved wheels, closes thevalve S, and stops the drum M by tightening the brake-strap. The enginecontinues to move slowly, receiving, as before shown, its steam throughthe pipe V; byeasing on the lever P the :drum, by the weight of theload, unwinds at a speed commensurate with the degree of pressure of thebrake-strap on its ange. The regulatingvalve S has sufficient lap toshut oif the steam from that source when the levervis at mid gear or in'a vertical position-that is, when the drum is in such position that thegrooved wheels do not mesh and the brake-strap does not bind on itsange;

The steam-chest valve is worked by an eccentric and rod, as usual. Theregulating or operating valve S can be a valve of almost anyconstruction. It must have sufficient lap to permit the drum to unwindand at the same time be conditioned for admitting steam to thesteam-chest D the instant the grooved wheels mesh.

I claim as my invention- 1. A hoisting-engine, in which the opeml,sido-rods c, and the oranksf, as shown and tions of throwing ont ofContact the friction desorbed.-

or gear Wheels, the braking of the drum- In testimony whereof I hereuntosign my shaft, and shutting off the steam, are aooornnzunoinpresenceoftwo subscribing Witnesses. plshod simultaneously by means of Lsin g1@ WILLIAM O. VILLIAMSON. lover.

2. The combination and arrangement of the 'Witnessesz drum-shaft K,ecoentrcs L, drum M, spur- GEO. SHELMERDINE,

Wheel N, rook-shaft 0,1ever P, strap Q, crank FRANCIS D. PASTORIUS.

